other-guides: remove testbed.osism.xyz from the testbed chapter (#696)

Signed-off-by: Christian Berendt <[email protected]>

docs/guides/other-guides/testbed.mdx

@@ -605,14 +605,14 @@ In the testbed, three volumes per node are provided for use by Ceph by default.
 these devices are used as OSDs during the initial deployment. The third device is intended
 for testing the addition of a further OSD to the Ceph cluster.
 
-1. Add `sdd` to `ceph_osd_devices` in `/opt/configuration/inventory/host_vars/testbed-node-0.testbed.osism.xyz/ceph-lvm-configuration.yml`.
+1. Add `sdd` to `ceph_osd_devices` in `/opt/configuration/inventory/host_vars/testbed-node-0/ceph-lvm-configuration.yml`.
    The following content is an example, the IDs look different everywhere. Do not copy 1:1
    but only add `sdd` to the file.
 
 ```yaml
 ---
 #
-# This is Ceph LVM configuration for testbed-node-0.testbed.osism.xyz
+# This is Ceph LVM configuration for testbed-node-0
 # generated by ceph-configure-lvm-volumes playbook.
 #
 ceph_osd_devices:
@@ -628,15 +628,15 @@ lvm_volumes:
   data_vg: ceph-29899765-42bf-557b-ae9c-5c7c984b2243
 ```
 
-2. Run `osism apply ceph-configure-lvm-volumes -l testbed-node-0.testbed.osism.xyz`
+2. Run `osism apply ceph-configure-lvm-volumes -l testbed-node-0`
 
-3. Run `cp /tmp/testbed-node-0.testbed.osism.xyz-ceph-lvm-configuration.yml /opt/configuration/inventory/host_vars/testbed-node-0.testbed.osism.xyz/ceph-lvm-configuration.yml`.
+3. Run `cp /tmp/testbed-node-0-ceph-lvm-configuration.yml /opt/configuration/inventory/host_vars/testbed-node-0/ceph-lvm-configuration.yml`.
 
 4. Run `osism reconciler sync`
 
-5. Run `osism apply ceph-create-lvm-devices -l testbed-node-0.testbed.osism.xyz`
+5. Run `osism apply ceph-create-lvm-devices -l testbed-node-0`
 
-6. Run `osism apply ceph-osds -l testbed-node-0.testbed.osism.xyz -e ceph_handler_osds_restart=false`
+6. Run `osism apply ceph-osds -l testbed-node-0 -e ceph_handler_osds_restart=false`
 
 7. Check the OSD tree